diff --git a/include/pic.h b/include/pic.h
index 4d37dedb..420a1fe5 100644
--- a/include/pic.h
+++ b/include/pic.h
@@ -49,7 +49,7 @@ INLINE Bits PIC_MakeCycles(double amount) {
 }
 
 INLINE double PIC_FullIndex(void) {
-	return PIC_Ticks+PIC_TickIndex();
+	return PIC_Ticks+(double)PIC_TickIndex();
 }
 
 void PIC_ActivateIRQ(Bitu irq);